Almost every weekday between the fall of 2011 and early 2015, a Russian broker named Igor Volkov called the equities desk of Deutsche Bank’s Moscow headquarters...speak to a sales trader ... to place two trades simultaneously. In one, he would use Russian rubles to buy a blue-chip Russian stock, such as Lukoil, for a Russian company that he represented ... for about ten million dollars’ worth of the stock. In the second trade, Volkov—acting on behalf of a different company, which typically was registered in an offshore territory, such as the British Virgin Islands—would sell the same Russian stock, in the same quantity, in London, in exchange for dollars, pounds, or euros. Both the Russian company and the offshore company had the same owner. Deutsche Bank was helping the client to buy and sell to himself.

These transactions had nothing to do with pursuing profit. They were a way to expatriate money. Because the Russian company and the offshore company both belonged to the same owner, these ordinary-seeming trades had an alchemical purpose: to turn rubles that were stuck in Russia into dollars stashed outside Russia. On the Moscow markets, this sleight of hand had a nickname: konvert, which means “envelope” and echoes the English verb “convert.” In the English-language media, the scheme has become known as “mirror trading.”

Mirror trades are not inherently illegal. ...Viewed with detachment, however, repeated mirror trades suggest a sustained plot to shift and hide money of possibly dubious origin. Deutsche Bank’s actions are now under investigation by the U.S. Department of Justice, the New York State Department of Financial Services, and financial regulators in the U.K. and in Germany. In an internal report, Deutsche Bank has admitted that, until April, 2015, when three members of its Russian equities desk were suspended for their role in the mirror trades, about ten billion dollars was spirited out of Russia through the scheme. The lingering question is whose money was moved, and why.